Raw Water (Sea Water) Draining And Filling - ILMOR 2011 MV8 User Manual

Raw Water
(Sea Water)
Draining and Filling
Ignoring elevated temperatures on a temperature gauge or any other evidence of the
engine operating at temperatures above recommended levels can result in serious
damage to the engine. Any resulting damage will not be covered by the warranty.
• Inspect the inside of the impeller housing. If any rubber extrusions on the end of the
arm appear frayed or worn, it should be replaced. If there is not a slight bend to the
paddle-wheel arms, replace it. Debris entering the impeller inevitably will damage
it. However, the impeller serves its purpose in deflecting debris and keeping it out
of much more expensive internal engine parts.
• Any uncertainty about the condition of the impeller means that it should
be removed and inspected. T he impeller fits very snugly and will require
some care in removing and re-installing or installing a new one. This
ensures proper operation. The use of soap or water-based petroleum
jelly will help with installation. Note that proper placement on the gear
results in a squeeze on the arms. T his is the correct installation.
• Place a gasket between the housing and the cover are ensuring that
the surfaces are smooth and clean. Re-install with the screws loos-
ened with the face plate was removed earlier. Do not over-tighten the
brass screws as it will cause them to break.
(See also the instructions for Flushing Raw Water/Sea Pump System that appears in After Each Use
section immediately preceding this section of this Owner's Manual. For closed cooling systems see
"Coolant Draining (Changing) and Filling," which follows immediately.)
NOTE: Filling and air bleeding is automatic when the raw water pump is op-
erating i.e. pumping fresh water from the lake or garden hose. There is no
need to leave any caps, drain plugs, or hoses open for air bleeding.
For open cooling systems:
• Drain exhaust manifolds of raw water by removing ½" NPT pipe plugs from water rails.
• Drain engine block of raw water.
• For 5.7L applications: Remove knock sensors/drain plugs from both sides of the
engine block.
• For 6.0L applications: Remove the electric heater 17mm Allen plug from engine
block raw water pump side. Remove the 10mm Allen plug on starter side of en-
gine block.
• For 6.2L applications: Remove electric heater 17mm Allen plug
from engine block raw water pump side. Remove the 10mm
Allen plug on starter side of engine block.
2011 ILMOR MV8 Owner's Manual • Page 33